Concrete-tile mold.



No. 873,634. 7 PATENTED 1330.10, 1907. W. s. THOMAS.

CONCRETE TILE MOLD.

' APPLICATION FILED MA-R.1s, 1907.

6 7 0/ n S m/m r ,V I A W I PATENT OFFICE.

WILLIAM S. THOMAS, OF EATON, COLORADO.

CONCRETE-TILE MOLD.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed March 18. 1907- Scrial No. 363-080.

T 0 all whom it may concern:

Be it known that I, W'ILLIAM S. THOMAS,

a citizen of the United States, residing at Eaton, in the county ofl/Veld and State of Colorado, have invented a new and usefulOoncrete-Tile Mold, of which the following is a specification.

This invention relates to molds of that general class especiallydesigned for use in the manufacture of open top tiles or drains forditches, gutters or in the construction of sewers, culverts and thelike.

The object of the invention is to provide a comparatively simple andinexpensive mold by means of which concrete open top tiles or drains maybe conveniently and expeditiously manufactured.

A further object of the invention is to provide a sectional mold capableof being readily set up for use and quickly knocked down and compactlynested for transportation or shipment.

A'still further object of the invention is to generally im rove thisclass of devices so as to increase their utility, durability andefliciency.

Further objects and advantages will ap pear in the followingdescription, it being understood that various changes in form,proportions and minor details of construction may be resorted to withinthe scope of the appended claims.

' In the accompanying drawings forming a part of this specification:Figure 1 is a perspective view of a tile or drain constructed inaccordance with my invention. Fig. 2 is a transverse sectional view ofthe same. Fig. 3 is a longitudinal sectional view. Fig. 4 is aperspective view of the molded tile or drain. Fig. 5 is a similar viewshowing several of the drains coupled together.

Similar numerals of reference indicate corresponding parts in all of thefigures of the drawings.

The improved mold forming the subject.

matter of the present invention includes an inner shell or jacket 6 andouter shell or jacket 5, said shells being substantially U shaped incross section and formed of metal or other suitable material.

The outer shell 5 is provided with an an nular off set portion orshoulder 7 defining a depending flange 8, there being a similar shoulder9 and flange 10 formed on the inner shell 6 and which in conjuncturewith the flange and shoulder on the outer shell forms 1 a socket 11 onone end of the molded tile or product, indicated as a Whole at 12.

The inner and outer shells 5 and 6 are spaced apart to form anintermediate molding compartment 13 adapted to receive the cement,concrete or other plastic material, and formed on the longitudinal edgesof the co-acting shells are dove tailed flanges 14 whichslidablyengagecorrespondinglyshaped grooves 15 formed in the adjacent face of asupporting'member or plate 16.

The plate 16 is of the same height as the shells 5 and 6 and ispreferably formed with a central elongated opening or slot 17 so as toreduce the weight of the plate and permit the latter to be readilyhandled when assembling or disassembling the several parts comprisingthe mold.

The exterior wall of the inner shell 6 is provided with an annular beador rib 18 which projects within the molding compartment 13 and forms aseating groove or recess 19 in the tile 12, said groove being adapted toreceive a head gate or valve for cutting olf the flow of water throughthe tile, when several of said tiles are laid to form a drain orculvert.

inner shells 5 and 6 are fastened in position on the supporting memberor frame 16 by introducing the dove tailed flanges 14 in the grooves 15and sliding said shells longitudithe frame are in alinement with theadjacent ends of the shells. The mold is then placed in position on atable, bench or other suitable support and the cement, concrete or otherplastic material shoveled or otherwise introduced in the moldingcompartment 13, said concrete being thoroughly tamped so as to produce asolid homogeneous tile.

In order to remove the tile it is merely necessary to slide the frame orplate 16 longitudinally of the shells when said shells may be movedlaterally from engagement with the adjacent walls of the tile so thatthe lat ter may be conveniently carried to the drying racks untilsufficiently hard for use.

If desired the tile may be reinforcedand strengthened by embedding astrip of Wire netting or suitable steel rods or wires in the concreteduring the formation of the tile.

In forming a sewer, drain or culvert the tiles are placed in position inthe ditch with the reduced end of one tile engaging the socket 11' ofthe adjacent tile and With the closed ends of the tiles resting on thebottom In molding the drains or tiles the outer and nally of the frameuntil the opposite ends of be readily understood.

of the ditch. The open top of the tile may be-covered with boards, fiatrocks, slabs or cement blocks or if desired the top of the drain may bearched over in any suitable manner. When boardsare used to form aclosure for the drain suitable threaded bolts will be embedded in theopposite longitudinal edges of the several tiles for engagement with theboards or planks, the latter being held in position by means of clampingnuts engaging the threaded ends of the bolts, as will One or more of thetiles may be formed with a substantially U shaped opening 20 in one sidewall thereof so as to permit the introduction of the meeting tile whenit is desired to arrange two or more tiles at right angles to eachother, as best shown in Fig. 5 of the drawings.

From the foregoing description it will be seen that there is provided anextremely simple, inexpensive and efficient device admirably adapted forthe attainment of the ends in view.

Having thus described the invention what is claimed is: a

A mold including a vertically disposed supporting frame provided withspaced longitudinal dove tailed grooves, and substan- 1 tially U shapedopen ended shells having their longitudinal edges provided withcorresponding dove tailed flanges adapted to slidably-engage the groovesin the supporting frame and each provided at one end with a lateraloffset, the inner shell being spaced from the outer shell to form anintermediate molding compartment and having its exterior walls providedwithan intermediate circumferential rib extending laterally with? in themolding compartment and having its opposite ends terminating flush withthe inner surface of the supporting frame, there being an elongatedopening formed in the frame between the dove tailed flanges of the innershell.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature in the presence of two witnesses.

WILLIAM S. THOMAS.

Witnesses:

CnAs. KRUGER, ANNIE PARROTT.

